diff --git a/entrypoint.sh b/entrypoint.sh
index f814b6a..13142a1 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/bin/sh
 echo "${SCHEDULE} ansible-playbook /netcup-dns/update-dns.yaml" > /etc/crontabs/root
 exec "$@"